I made one cup of coffee this morning and it too promptly sold out. If you don’t give actual numbers, calling a sell out doesn’t actually matter. It matters for Apple only because they always give numbers. No one else seems to.
That’s not to say that Nexus 4 isn’t selling fast — in the U.K., where LTE is just starting to roll-out, a non-LTE phone should find easier success — it’s just to say that we don’t and probably won’t actually know that. Actual numbers are what matter here.